Mopar MD145655 Right Camshaft Assembly

Position the engine at TDC on the compression stroke for the number 1 cylinder. If removing the front (radiator side) cylinder head, remove the bolts and gently pry off the distributor drive adapter. Remove the rocker arm assembly. Carefully pry the camshaft plugs from the rear section (transaxle end) of the cylinder head, taking care not to scratch or nick the camshaft. Lift the camshaft from the cylinder head and inspect it. Lubricate the camshaft bearing journals and lobes with moly-base grease or engine assembly lube, then install it carefully in the head, ensuring not to scratch the bearing surfaces with the cam lobes. Install the distributor drive adapter retaining bolts and tighten them to the specified torque. Check that the mark on the crankshaft sprocket is still aligned with its mark on the oil pump, then slide the camshaft sprockets onto the camshafts and align the marks on the sprockets with their corresponding marks on the cylinder heads. The remaining steps follow the reverse order of the removal procedure.

Visually check the camshaft bearing surfaces for pitting, score marks, galling, and abnormal wear; if damaged, the head must be replaced. Check camshaft runout by placing the camshaft between two V-blocks and setting up a dial indicator on the center journal, zeroing the dial indicator before turning the camshaft slowly to note the total indicator reading. Record the readings and compare them with the specified runout; if the measured runout exceeds the limit, replace the camshaft. Measure each camshaft lobe height with a micrometer and compare it to the specified height, subtracting the measured height from the specified height to compute wear on the cam lobes, ensuring it does not exceed the specified wear limit; if it does, replace the camshaft. Inspect the contact and sliding surfaces of each hydraulic lash adjuster for scoring or damage, replacing any defective parts. Check the rocker arms and shafts for abnormal wear, pits, galling, score marks, and rough spots, avoiding attempts to restore rocker arms by grinding the pad surfaces, and replace any defective parts.